[Enhancement] Update reports internals

[JimBugwadia]

Description

The section here is outdated and needs to be updated for 1.12 ephemeral reports:

https://kyverno.io/docs/policy-reports/#report-internals

Slack discussion

No response

[A-5ingh]

/assign
@JimBugwadia Can you please provide some background on this as I am still learning kyverno.

[A-5ingh]

@realshuting If you can please suggest above ⬆️

[JimBugwadia]

Hi @A-5ingh - this issue requires familiarity with the internals of the reporting sub-system, so may be best handled by @vishal-chdhry or @eddycharly.

Please check for other available issues at:

https://github.com/orgs/kyverno/projects/10